Service Provider Architectures

Transcription

1 Service Provider Architectures Enrico Mercadante 1 Introduction Focus For Today Brief Overview of the Market Segmentation and typical Service Offerings by Service Providers Discussion focusing on Service Provider architectures and relative technologies Focus will be on Architectures that take advantage from the IP protocols suite Questions are GREATLY encouraged 2

2 Technology and Services Technology-driven approach Technology as driver for Services Typically: One <--supports--> One Service Example: PSTN, Basic Access Service-centric approach Services as Driver, Technology as Enabler Typically: One <--supports--> Many Services Example: Integrated Access (Voice/Video/Data) 3 SPs have to sell Profitable Services $ Increase Service Revenue Cost Profitability Revenue Increase revenue Reduce cost of operations Expand addressable market Reduce Operations Cost t 4

3 Service Provider Horizontal Market Segmentation Top Business >500 empl. Addressable Market for a SP in Italy Different -Requirements -Needs -Budgets Residential Business Medium Business empl. Small Business 6-50 empl. Soho 1 5 empl. Residential ,2 M 20 M 5 Many Services, Different s, How many s? e.biscom S OPERATION STRATEGY segments 1 Businesses Different networks used by... Incumbents CLECs Residentials Cable TVs New Broadband SP Voice Data / Video Services 6

4 Value Added Services Enable Revenue Generation Increasing Service Differentiation Video VPN Voice over Data Managed Firewall Service Managed Access Basic Access Profit Per Line 7 Services: Targeting the High-Tech Mfg. Media Banking IT Securities Consumer Products Retail Transport Service Providers Industrial Mfg. Energy Insurance Utilities Healthcare Public Sector Innovators Early Adopters Early Majority Late Majority Laggards 8

5 Bundling SP Offerings to Meet Enterprise Needs Vertical Segmentation Financial Services Retail and Consumer Manufacturing Governement Media and Entertainment SP Services Storage IP VPN IP Telephony Managed Hosting Content Delivery Unified Communications SP Services IP VPN Hosted Applications IP Telephony Mobile Wireless Portals Content Delivery Broadband Access (stores) IP Core IP Contact Center SP Services Managed Hosting Services Hosted Applications IP VPN Content Delivery IP Telephony/ Managed Voice Broadband Access Unified Communications IP Contact Center SP Services Managed Hosting Services Storage Content Delivery Hosted Applications IP VPN IP Contact Center SP Services Security Storage Content Delivery (streaming) Managed Hosting Services IP VPN Mobile Wireless ATM Digital Encryption Digital Asset Management 9 Services When building Services the following tasks must be taken into account: Pricing Billing Marketing (packaging, advertisement) Service Level Agreement Monitoring Fault Management Service Provisioning Technology 10

6 Typical Services for Residential s on a IP capable infrastructure Voice Provided Features: Basic call and Supplementary Srvcs Reliability % (5 min/year outage) Voice Quality: MOS( Mean Opinion Score) > 3.9 ( 1 < MOS <5) Billing: Flat or Time Based Analogue phone compatibility Data Provided Features: Data Access/ Public IP committed speed (ex. 56kbps) Reliability <<99% Billing: Free, Flat or Volume Based Video VCR or DVD quality Reliability 99% # of Channels / Films Billing: Time Based or Per-Film 11 MOS Rating of Digital Voice Codec Bit MIPs Comp. Framing MOS Rate Delay(ms) Size G.711 PCM G.726 ADPCM G.728 LD-CELP G.729 CS-ACELP G.729a CS-ACELP G MPMLQ G ACELP ? 12

7 Typical Services for Business s Data Service Provided Features VPN (intranet) Remote Access to VPN Connectivity Managed Security Reliability 99% Billing: Flat Voice Service Provided Features Basic Call Managed PBX Private Numbering Plan Voice Quality: MOS( Mean Opinion Score) > 3.9 Reliability % (5 min/year outage) Billing: Flat or Time Based 13 Example of Connectivity parameters IP Transfer Delay - L (ms) IP Loss Ratio - P (%) Reachability (%) Average values 75 < L < 85 0 < P < 1,5 99 < R < 100 Optimum range L < 50 P < 2,5 R > 99 Ref. draft Rec. ITU-T Y

8 Virtual Private s Intranet VPN Intranet VPN Provides interconnections between the customer s remote sites and corporate intranet/extranet typically using dedicated connections over a shared network Used by remote and branch offices to connect to headquarters Remote Office Main Office Branch Office / IP, FR, ATM Service Provider 15 Virtual Private s Extranet VPN Extranet VPN Extends corporate intranet services to suppliers, customers, partners or communities of interest over a shared infrastructure typically using dedicated connections over a shared network Architecturally comparable to Intranet VPN with additional traffic control, security and interoperability issues Remote Office Supplier A Main Office Branch Office / IP, FR, ATM Service Provider Supplier B 16

9 Virtual Private s Access VPN Access VPN Provides remote access to corporate intranets/extranets using the shared infrastructure of the service provider(s) but preserving the policies of a private network Used by telecommuters, mobile users or branch offices Service Provider Corporate Intranet / IP, FR, ATM Security Server 17 Platform Definitions DSLAM NAS, Voice Gateway Layer 2 Switch Label Switch Router Premises Router 18

10 Functional View of the SP Infrastructure Premises CPE Access (s) CORE (s) Services And Interconnection -2-2 Device -1-1 Operation Support / Business Support Systems 19 Residential s: Data ( Access) Service Dial Access Access Core Gateways NAS CO CO IP Transport CO Intermedate CO e.g. POS Modem PSTN User Authentication/Authorization Operation Support / Business Support Systems 20

11 Structure Of The Traditional assumption that the was based on a well ordered provider client hierarchy. Transit ISP Transit ISP National ISP National ISP National ISP Regional ISP Regional ISP Regional ISP Regional ISP Local ISP Local ISP Local ISP Local ISP Local ISP 21 Structure Of The The reality is not so ideal Unordered subset of interconnects Driven by business requirements underpinned by performance Non-disclosure and bilateral agreements Peering is now considered a corporate asset & legal concern Transit ISP Transit ISP National ISP National ISP National ISP Regional ISP Regional ISP Regional ISP Regional ISP Local ISP Local ISP Local ISP Local ISP Local ISP 22

12 Structure Of The Shows 626,773 IP addresses 1,007,723 IP links 48,302 ( 52%) of globally routable network prefixes 25,126 peering links Reflects some level of hierarchy Clearly shows lack of order at the periphery Thanks to CAIDA 23 Residential s: Data ( Access) Service DSL Access Premises Access Aggregation CORE Gateways CPE DSLAM xdsl ATM IP Transport e.g. POS Operation Support / Business Support Systems 24

13 Basic DSL Services DSL Service Max. Data Rate Down/Uplink (bps) Copper Pairs Required Analog Voice Support Max. Reach (km-feet) VDSL Very High Bit Rate DSL 52M/12.0M or 8M/8M 1 Yes.9-10,000 ADSL Asymmetric DSL (CAP, DMT) HDSL High Bit Rate DSL SDSL/HDSL2 Symmetric DSL Up to 8M/0.8M 1.5M 2.0M/ 1.5M 2.0M Up to 1.5 Mbps/ 1.5 Mbps 1 Yes ,000 2 No ,000 1 No ,000 IDSL ISDN DSL 144K/144K 1 No ,000 ISDN 128K/128K 1 No , Provisioning Challenge CPE Config 1 3 Truckrolls Duration: 1 2 Weeks Manual Loop Qualification Duration: 3 5 Days Central Office M D F Voice Switch DSLAM MDF-DSLAM Cross-Connect Duration: 2 5 Days Reseller Manual Ordering Processing Duration: Days Multiple NMS, EMS Systems Duration: 1 15 Day Total Working Days 26

14 Residential/Business s: Data ( Access) Service Ethernet to the Home Access Premises CPE Access CORE Gateways Gigabit Ethernet IP Transport e.g. POS Operation Support / Business Support Systems 27 In-Building Connectivity Residential CPE Copper (UTP5) or Fiber Vertical cabling (Ethernet or FE) Layer 2 Switch in the basement Edge IP Ring Typical Residential Building 28

15 Residential/Business s: Data ( Access) and Voice Service Ethernet to the Home Access Premises CPE Access CORE V V Gigabit Ethernet IP Transport H.323 Gatekeepers Voice Gateway V PSTN e.g. POS V Operation Support / Business Support Systems 29 Packet-over-SONET/SDH (PoS) Datagrams Protocol encapsulation Link Initialization PPP Packet Delineation Error Control Byte Delineation IP PPP In Byte Synchronous HDLC Framing SONET/SDH Layer Data Link Layer Physical Layer Point-to-Point Protocol, IETF RFC 1661 PPP in HDLC- Like Framing, IETF RFC 1662 PPP over SONET/SDH, IETF RFC

16 Business s: Data (VPN) Service ATM/Frame Relay Premises CPE Access CORE Frame Relay or ATM ATM Could also be An IP Core Operation Support / Business Support Systems 31 Virtual Private s VPN Services/Technologies Service Architectures VPN-enabling Technologies Access VPN Intranet / Extranet VPN Client Initiated NAS Initiated Overlays: IP Tunnels Virtual Circuits -Based Peering: MPLS-VPN L2TP, IPSec, PPTP GRE, IPSec, MPLS 32

17 Access Technologies- Distance 1000 Mbit/s Mbit/s 155 Mbit/s 100 Mbit/s Mbit/s Mbit/s Mbit/s Mbit/s Mbit/s GE SX 10BASE TX VDSL Shared Wireless LAN PON 100BASE TX 100BASE FL 100BASE SX ADSL GE LX SDH Dedicated lines Frame Relay Cable Modem Km 33 Business s: Data (VPN) Service IP-VPN (MPLS-VPN) Premises CPE (CE router) Access CORE IP/Ethernet or IP/ATM or IP/FR PE router MPLS CORE e.g. POS Operation Support / Business Support Systems 34

18 VPN-IP Address Format VPN-ID IP Address/Mask Length General Format /16 VPN-IPv4 Example VPN-ID is a 64-bit customer identifier Never carried on packets, only in Label tables Two formats (Autonomous System No./ subfield) or (IP Address/ subfield) Each customer network can use Registered IP addresses Illegal, unregistered addresses Private addresses (RFC 1918), e.g. 10.x.x.x 35 Business s: Voice (PBX interconnection) Service Interconnection through Leased Line Premises CPE Access (s) PBX PSTN TDM MUX TDM transport PBX TDM MUX Operation Support / Business Support Systems 36

19 Business s: Voice (PBX interconnection) Service Interconnection through VoIP Premises CPE Access CORE PBX V IP/Ethernet or IP/ATM or IP/FR IP Transport PBX e.g. POS V Operation Support / Business Support Systems 37 Business s: Voice; Data VPN; Access Voice VPN with Leased Line+Data VPN with FR Premises CPE Access s CORE PBX TDM transport TDM MUX Frame Relay ATM PBX TDM MUX TDM transport 38

20 Business s: Voice; Data VPN; Access Integrated Access with MPLS-VPN and H.323 VoIP Premises CPE Access CORE PBX V IP/Ethernet or IP/ATM or IP/FR PE router Voice Gateway MPLS CORE + H.323 Gatekeepers V PSTN V PBX Operation Support / Business Support Systems 39